Added "explicit" keyword to constructors for several API classes.

openmmapi/include/openmm/CMMotionRemover.h

@@ -48,7 +48,7 @@ public:
     /**
      * Create a CMMotionRemover.
      */
-    CMMotionRemover(int frequency = 1);
+    explicit CMMotionRemover(int frequency = 1);
     /**
      * Get the frequency (in time steps) at which center of mass motion should be removed
      */

openmmapi/include/openmm/CustomAngleForce.h

@@ -76,7 +76,7 @@ public:
      * @param energy    an algebraic expression giving the interaction energy between three particles as a function
      *                  of theta, the angle between them
      */
-    CustomAngleForce(const std::string& energy);
+    explicit CustomAngleForce(const std::string& energy);
     /**
      * Get the number of angles for which force field parameters have been defined.
      */

openmmapi/include/openmm/CustomBondForce.h

@@ -76,7 +76,7 @@ public:
      * @param energy    an algebraic expression giving the interaction energy between two bonded particles as a function
      *                  of r, the distance between them
      */
-    CustomBondForce(const std::string& energy);
+    explicit CustomBondForce(const std::string& energy);
     /**
      * Get the number of bonds for which force field parameters have been defined.
      */

openmmapi/include/openmm/CustomExternalForce.h

@@ -79,7 +79,7 @@ public:
      * @param energy    an algebraic expression giving the potential energy of each particle as a function
      *                  of its x, y, and z coordinates
      */
-    CustomExternalForce(const std::string& energy);
+    explicit CustomExternalForce(const std::string& energy);
     /**
      * Get the number of particles for which force field parameters have been defined.
      */

openmmapi/include/openmm/CustomHbondForce.h

@@ -123,7 +123,7 @@ public:
      *                  of inter-particle distances, angles, and dihedrals, as well as any global, per-donor, and
      *                  per-acceptor parameters
      */
-    CustomHbondForce(const std::string& energy);
+    explicit CustomHbondForce(const std::string& energy);
     /**
      * Get the number of donors for which force field parameters have been defined.
      */

openmmapi/include/openmm/CustomNonbondedForce.h

@@ -110,7 +110,7 @@ public:
      * @param energy    an algebraic expression giving the interaction energy between two particles as a function
      *                  of r, the distance between them, as well as any global and per-particle parameters
      */
-    CustomNonbondedForce(const std::string& energy);
+    explicit CustomNonbondedForce(const std::string& energy);
     /**
      * Get the number of particles for which force field parameters have been defined.
      */

openmmapi/include/openmm/CustomTorsionForce.h

@@ -76,7 +76,7 @@ public:
      * @param energy    an algebraic expression giving the interaction energy between three particles as a function
      *                  of theta, the torsion angle between them
      */
-    CustomTorsionForce(const std::string& energy);
+    explicit CustomTorsionForce(const std::string& energy);
     /**
      * Get the number of torsions for which force field parameters have been defined.
      */

openmmapi/include/openmm/OpenMMException.h

@@ -43,7 +43,7 @@ namespace OpenMM {
 
 class OpenMMException : public std::exception {
 public:
-    OpenMMException(const std::string& message) : message(message) {
+    explicit OpenMMException(const std::string& message) : message(message) {
     }
     ~OpenMMException() throw() {
     }

openmmapi/include/openmm/VariableVerletIntegrator.h

@@ -65,7 +65,7 @@ public:
      *
      * @param errorTol    the error tolerance
      */
-    VariableVerletIntegrator(double errorTol);
+    explicit VariableVerletIntegrator(double errorTol);
     /**
      * Get the error tolerance.
      */

openmmapi/include/openmm/VerletIntegrator.h

@@ -49,7 +49,7 @@ public:
      * 
      * @param stepSize the step size with which to integrator the system (in picoseconds)
      */
-    VerletIntegrator(double stepSize);
+    explicit VerletIntegrator(double stepSize);
    /**
      * Advance a simulation through time by taking a series of time steps.
      *